package com.itheima.demo1;

public class Demo1 {
    public static void main(String[] args) {
//        int[] arr1 = {1, 2, 3, 4, 5, 6};
//        int[] arr2 = {7, 8, 9, 10, 11, 12};
//        int[] arr3 = {13, 14, 15, 16, 17, 18};
//        int[][] arr = new int[3][3];
//        //arr2[2][2] = 3;
//        arr[0] = arr1;
//        arr[1] = arr2;
//        arr[2] = arr3;
        System.out.println("hello world");
        System.out.println("hello world");



//
    }

}
